Commitments And Other Matters (Narrative) (Details) $ in Millions	12 Months Ended
	Mar. 31, 2023 USD ($)
Commitments And Other Matters [Line Items]
Total amount of advances funded towards tobacco purchase	$ 171
Commitments relating to agricultural materials,capital expenditures	117
Other contingent liabilities	1
Santa Catarina [Member]
Commitments And Other Matters [Line Items]
Brazil Audit Assessment For Tax, Penalties, And Interest On Recoverable Value Added Tax Credits	8
Reduction of Brazil Audit Assessment For Tax, Penalties, And Interest On Recoverable Value Added Tax Credits	10
Santa Catarina [Member] | Minimum [Member]
Commitments And Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	0
Santa Catarina [Member] | Maximum [Member]
Commitments And Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	10
Parana [Member]
Commitments And Other Matters [Line Items]
Brazil Audit Assessment For Tax, Penalties, And Interest On Recoverable Value Added Tax Credits	11
Reduction of Brazil Audit Assessment For Tax, Penalties, And Interest On Recoverable Value Added Tax Credits	3
Parana [Member] | Minimum [Member]
Commitments And Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	0
Parana [Member] | Maximum [Member]
Commitments And Other Matters [Line Items]
Estimate of possible loss on remaining VAT audit assessment	3
Next Fiscal Year [Member]
Commitments And Other Matters [Line Items]
Tobacco purchase contracts	759
After Next Fiscal Year [Member]
Commitments And Other Matters [Line Items]
Tobacco purchase contracts	$ 169